This is Interpolate Points, but for a whole line instead of a single point: every point along one polyline blends toward its counterpart on the other, by the same 0–1 factor. For example, blending a rough first-pass road alignment toward its final surveyed alignment, or stepping a building outline partway from one massing option toward another.
Feed a List of factors into "factor" instead of a single number to get a whole series of in-between shapes back at once, instead of just one — handy for generating a sequence of intermediate steps rather than a single blend.
Category: Geometric Operations
Kind: Operation
Description: tween between two polylines
Inputs
Name | Abbreviation | Type | Access | Description |
a | A | Cartesian | Item | the first polyline |
b | B | Cartesian | Item | the second polyline |
factor (default 0.5) | F | Number | Item | the interpolation factor — 0 returns "a", 1 returns "b" |
Outputs
Name | Abbreviation | Type | Access | Description |
feature | F | Cartesian | Item | the tweened polyline (or a list of them, if "factor" was a list) |
How to
Add the Tween Polylines node.
Feed in two polylines, "a" and "b" — from Line, Line String from Points, or Read Feature on drawn geometry.
Set "factor" to how far between them you want the result.
The output is a new polyline shaped in-between the two originals.